7. Prunus ussuriensis Kovalev & Kostina, Trudy Prikl. Bot., Ser. 8, Plodovolye Yagodnye Kul’t. 4: 75. 1935.
东北李 dong bei li
Prunus salicina Lindley var. mandshurica (Skvortzov) Skvortzov & Baranov; P. triflora Roxburgh var. mandshurica Skvortzov.
Trees 2.5–3 m tall. Branches grayish black, robust, glabrous; branchlets reddish brown, glabrous. Winter buds reddish brown, usually glabrous. Stipules lanceolate, margin glandular serrate, apex acuminate. Petiole glabrous, without nectaries; leaf blade obovate-oblong, rarely elliptic, 4–7(–9) × 2–4 cm, abaxially pale green and basally sparsely pubescent, adaxially dark green and basally sparsely pubescent, base cuneate to rarely broadly cuneate, margin serrate or biserrate with teeth often gland-tipped, apex caudate, acuminate, or acute; midvein and secondary veins abaxially conspicuous and raised, adaxially impressed. Flowers 2 or 3 in a fascicle, rarely solitary, 1–1.2 cm in diam. Pedicel 0.7–1.3 cm, glabrous. Hypanthium outside glabrous. Sepals oblong, glabrous, margin gland-tipped serrulate, apex acute. Petals white, oblong, base cuneate and shortly clawed, margin undulate near apex. Ovary glabrous. Stigma disc-shaped. Drupe purplish red, ovoid, subglobose, or oblong, 1.5–2.5 cm in diam., glabrous; endocarp oblong, conspicuously grooved, inconspicuously pitted. Fl. Apr–May fr. Jun–Sep.
Forest margins, stream sides; 400--800 m. Heilongjiang, Jilin, Liaoning [Russia (Far East, E Siberia)].
This species is resistant to extreme cold and is cultivated in N China as a frost-hardy fruit tree.